
Product Introduction
The 5204320401 Air Reservoir 20L is an important pneumatic system component used in Mercedes-Benz NG, SK series and Beiben NG80 trucks. Installed in the compressed air circuit, it stores pressurized air from the air compressor and ensures continuous air supply for the truck braking system and other pneumatic control components.
Manufactured according to OEM specifications, this air reservoir features a strong steel tank body, accurate mounting dimensions, and reliable sealing performance. It is designed for high-pressure air environments, vibration conditions, and long-term commercial truck working conditions.

Technical Specifications
| Item | Specification |
| Product Name | Air Reservoir / Air Tank |
| OEM Part Number | 5204320401 |
| Vehicle Brand | Mercedes-Benz / Beiben |
| Compatible Models | NG / SK / NG80 |
| System | Pneumatic Brake System |
| Component Type | Compressed Air Storage Tank |
| Capacity | 20L |
| Position | Truck Chassis Pneumatic System |
| Material | High Strength Steel |
| Manufacturing Process | Welding + Pressure Testing + Surface Treatment |
| Function | Stores Compressed Air and Supplies Pneumatic Components |
| Working Medium | Compressed Air |
| Features | High Pressure Resistance, Leak Prevention, Durable Structure |
| Condition | Brand New |
| OEM Standard | Yes |
| Quality Test | Pressure Test / Leakage Test / Dimension Test / Fitment Test |
| Installation | OEM Direct Replacement |
| Packaging | Export Standard Packaging |
| Origin | China |
Vehicle Fitment
| Vehicle Brand | Compatible Models |
| Mercedes-Benz | NG Series |
| Mercedes-Benz | SK Series |
| Beiben | NG80 |
Payment & Shipping
| Category | Options |
| Payment Methods | T/T, PayPal, Western Union, MoneyGram, L/C, Alibaba Trade Assurance |
| Shipping Methods | DHL, FedEx, UPS, TNT |
| Delivery Time | 3–7 Days (Express), 20–45 Days (Sea Freight) |
| Trade Terms | EXW, FOB, CIF, CFR, DDP |
| Shipping Scope | Worldwide Shipping |
Related Products Categories
| Section/System | Common Spare Parts |
| Cylinder Block & Cylinder Head | Cylinder Block, Cylinder Head, Cylinder Liner, Piston, Piston Ring, Cylinder Head Gasket |
| Crankshaft System | Crankshaft, Connecting Rod, Bearing, Thrust Washer |
| Valve Train | Intake Valve, Exhaust Valve, Camshaft, Rocker Arm, Valve Spring |
| Fuel System | Injector, Fuel Pump, Fuel Filter |
| Cooling System | Water Pump, Thermostat, Radiator |
| Lubrication System | Oil Pump, Oil Cooler |
Transmission & Drivetrain Parts
| Section/System | Common Spare Parts |
| Clutch System | Clutch Disc, Pressure Plate, Release Bearing, Clutch Master Cylinder, Clutch Booster Cylinder |
| Gearbox System | Gearbox Assembly, Gear Set, Bearing, Seal |
| Differential System | Differential Assembly, Crown Wheel & Pinion, Differential Bearing |
| Driveshaft System | Propeller Shaft, Universal Joint, Drive Shaft Center Bearing, Flange Fork, Slip Yoke, Center Support |
| Axle System | Axle Shaft, Wheel Hub, Planetary Gear, Side Gear |
| Section/System | Common Spare Parts |
| Front Axle | Steering Knuckle, Kingpin Kit, Tie Rod, Wheel Hub |
| Rear Axle | Axle Housing, Hub, Differential Housing |
| Suspension System | Leaf Spring, Leaf Spring Bracket, Leaf Spring Seat, Torque Rod, Balance Shaft, Spring Shackle, Suspension Saddle, Shock Absorber, U-bolt |
| Steering System | Steering Gearbox, Drag Link, Steering Pump |
| Brake System | Brake Drum, Brake Shoe, Brake Chamber, Brake Valve, Slack Adjuster, Air Dryer, Air Hose |
Cabin & Body Parts
| Section/System | Common Spare Parts |
| Cabin Assembly | Cabin Body, Mounting, Door Lock, Door Handle, Door Hinge |
| Electrical System | Relay, Signal Lamp, Combination Instrument, Tachometer, Speedometer, Headlamp, Tail Lamp, Wiring Harness |
| Interior | Dashboard, Switch Panel, Instrument Cluster |
| Exterior | Bumper, Grille, Fender, Step |
